Alessandra Ambrosio, Kate Upton, Miranda Kerr and other top Victoria's Secret models are being photographed more frequently in risque topless poses for VS lingerie and bikini catalogs, as the fashion brand ramps up its sexiness. And with good reason.

Victoria's Secret has suddenly realized it has a marketing bonanza on is hands. Its annual swimwear catalog is now as hot, if not hotter than Sports Illustrated's annual best-selling swimsuit issue.

Victoria's Secret is selling the suits to boot. So why not go all out and turn the catalogs into a must read for men, too?

Check out VS's Topless Models; click to enlarge.

Adriana Lima

Allesandra Ambrosio

Cintia Dicker and Candice Swanepoel

Katarina Ivanovska

Erin Heatherton and Kate Upton

Lily Aldridge

Miranda Kerr and Maryna Linchuk

The Victoria's Secret swim and lingerie catalogs feature some of the hottest models in the business, all clad in the latest swimwear fashions, including the tiniest of bikinis, with and without tops.

Not since Victoria's Secret started airbrushing out nipples on the models in its lingerie catalog has a publication designed to sell products generated such interest.

Top models like Kerr and Ambrosio and an assortment of new faces, including Lindsay Ellingson, Adriana Lima, Cintia Dicker and Erin Heatherton are frequently photographed in semi-nude poses.

"I love the super hot, bright neon colors that Victoria's Secret has this season; they look great on the beach and lounging next to the pool."

Kerr raised eyebrows because she appeared unnaturally thin last year, but says she's willing to accept the criticism.

"As soon as you step into the public eye you need to take responsibility for the people you are influencing," she says.

"Body image is something that the majority of young women struggle with and I do think it is important that models are seen to be healthy and at a weight that works for their body type."

Kerr gave birth 11 months ago to a boy with actor Orlando Bloom, and was back in a bikini in less than four months.

She recently appeared on the cover and in a stunning photo shoot for the Aussie edition of Harper's Bazaar.

Victoria's secret has been a launching pad to major modeling deals. Many of the Victoria's Secret angels do double duty in the Sports Illustrated Swimsuit issue, which also features models in topless poses.

Ambrosio was recently dragged into the debate over model weight.

Her body shape was used in an ABC television news special as an example of a too-thin model. He shape was described as "pre-pubescent teen."

The photos of her in the feature, taken, on a St. Barts beach exposed her rib cage and pelvic bones.

But the shapely model looked healthy in her latest swimsuit shoot.

Ambrosio gave birth to daughter Anja Louise in August 2008, and it's filled her out.

She said she misses having the more rounded tush she gained while pregnant.

"I wish I had a bigger butt. A little bit more booty wouldn't hurt. When I was pregnant I had a much bigger booty and I was very happy with it," she recently told Fox News.